A SYNOPSIS OF THE APHIDIDAE 67 



75. Macrosiphum pteridis Wilson 



Figures 317, 318 

 Wilson, Trans. Am. Ent. Soc., vol. 41, p. 101, 1915 (orig. desc.). 



Records. Pteris aquilina; Walnut Creek, Contra Costa County, 1915 (David- 

 son). 



This species has been found by Davidson on the fronds of common 

 brake in the San Francisco Bay region. Wilson reported it as present 

 throughout southern and western Oregon. There are a few specimens 

 of the alate females in the author 's collection, received from Davidson. 



76. Macrosiphum rosae (Linn.) 



Figures 106, 151, 152 



Linnaeus, Syst. Nat. vol. 4, p. 73, 1735. Aphis (orig. desc.). 



Clarke, Can. Ent., vol. 35, p. 254, 1903. Nectarophora (list). 



Davidson, Jour. Econ. Ent., vol. 2, p. 304, 1909 (list). 



Davidson, Jour. Econ. Ent., vol. 3, p. 380, 1910 (list). 



Davidson, Pom. Jour. Ent., vol. 3, p. 399, 1911 (list). 



Essig, Pom. Jour. Ent., vol. 5, p. 550, 1911 (desc.). 



Games, Mon. Bull. Cal. Comm. Hort., vol. 1, p. 398, 1912 (list). 



Records. Eose; through California from Humboldt County south to San Diego 

 County (Clarke, Davidson, Morrison, Essig, Ferris, Shinji, the author). 



This is the common pink and green aphid of roses, known the 

 world over. The apterae are found most abundantly in the late win- 

 ter and early spring on the buds and stems of rose. As the alates are 

 matured they fly away, supposedly either to other rose bushes or to 

 various grains and grasses. This past spring (1917) it has been very 

 abundant in the vicinity of Eiverside, but the previous spring (1916) 

 in San Diego it was rare. There the most abundant rose aphis was 

 Myzaphis rosarum (Walker). 



77. Macrosiphum rudbeckiae (Fitch) 



Fitch, Cat. Homop. N. Y., p. 66, 1851. Aphis (orig. desc.). 

 Essig, Pom. Jour. Ent., vol. 3, p. 400, 1911. Aphis (dese.)." 

 Davidson, Jour. Econ. Ent., vol. 7, p. 137, 1914 (list). 



Records. Ambrosia psilostachya; Santa Paula (Essig) ; Baccharis viminalis; 

 Santa Paula (Essig), Riverside, September, 1916; Dipsacus fullonum; San Jose 

 (Davidson): Helianthus annuus; Eiverside, September, 1916; Salix sp. ; Chrysan- 

 themum; Arlington, Eiverside County, September, 1916; undetermined species of 

 Compositae; Bedwood Canyon, Contra Costa County, July, 1914 (E. W. Haegele). 



11 In the drawings accompanying this description by Essig the following mis- 

 takes are noticeable: the third discoidal vein of the forewings is twice-branched 

 instead of once-branched, and the third antenal segment of the apterous female 

 bears several secondary sensoria instead of none, as figured. 



